Speed-indicating device



April 22, 1930. E. F. MARTINET I 1,755,184

SPEED INDICATING DEVICE Filed Dec 22, 1928 2 Sheets-Sheet 1 INVEN TOR.

(fufna Zfiariinei.

BY aggww ATTORN Y5,

p l 1930; E. F. MARTINET 1,755,184

SPEED INDICATING DEVICE Filed Dec. 22, 1928 2 Sheets-Sheet 2 ll 45- 5 4 v INVENT OR.

u'gerz e F/Warfznef ATTORNEYJ.

Patented Apr. 22, 1930 UNITED-I- earns-a1? oEHcE;

EUGENE F. "MARTINET, OF- CLEVELAND, OHIO,

ASSIGNOR .ro THE DUAL; snnnnorrnrnn;

COMPANY, OF CLEVELAND, 01-110, A CORPORATION OF OHIO T SIfEED-INDIGATING DEYICE.

Application flled December 22, 1928;- SeriaLNo. 327,799.

This invention relates to. speed indicating.

devices, and more particularly speedometers capableof registering certain speeds as do sired; and it is among the objects of the invention to provide a construction allowing given instant A further indexing means in a registration. of speed at any with accuracy and convenience. object is the mounting. of I a compact and advantageous form. A. still further object-;is the arranging .of 1 control means in a relation to simplify attention-required. Other objects and advantages-willappear as the description proceeds.

To the accomplishment i of the foregoing and related ends, the invention then,consists of thefeatures hereinafter fully described, and particularlypointed out in the, 012111118 the following description and. 'theannexed drawings settingforthin detail certaln structure embodying the invention, such being illustrative however. of but one of thevari-.

ous ways in whichthe principle of the invenw tion maybe employed:

In} said. annexed drawings Fig. 1 is a face view of anembodiment of the invention; a Fig. 2 is a sectional iviewi' removed; Fig. 4 is an inside or rear viewof taken directly under the. coverglass; Figb. is a face viewwiththe.entirecover assem the translating and odometer. mechanism, centrlfugal', *magnetic or which maybe of other. type, as preferred, and the detail. of

which being lmmaterialto the present invention need not be shown. Extending from the translating mechanism, i. e. :the .mechanism which converts theirotary motion derived from the vehicle toza proportional speed indicating movement, is ashaft2 for actuating the indexing means. In the, particular form illustrated, the shaft projects. through the axial section of. the.complete;-de-.

slightly dial plate ;.-3 which carries am:

arcuately arranged scale 1 over whichsweeps a running; hand 5. 'This running hand is-so nmunted as tobe moved by theshafu but when I desired a can be readily =di;sengaged axiallyther-efrom so as to maintain its posi tion at that instant. andthereby -show a continuingmegistration on the corresponding scale readi-ng. The mechanism for v -accomplishingv such ,controlseparation from the a driving shaftmay vary somewhatin its;de--

tail, but inthe formillustrated involves a hub 6 fixedto the shaft and prefer-ably having an expanded disk-like extensionffi In the hub or rather. at a;;po,int; neanthe periphery the diskis airecess, for instance .a hole 8,:2L1ldr,

the running hand 5. carries a coactingprojec I tion or pin 9 capable of seatingtherein. Thus lrrespective -.of any particular cletail,;. the, mechanism contemplates generally-an inter engagement between running-indexror hand .7o=;

and shafticapable -of,:readyf. .separation for registry and ready reengagement in thesamew operating relation ,when such registry is :no longer required. An advantageous. constr lcw.

.tion involves a grooved.collan lQionlthemum "ning, hand, and-2a gfork; 11 -.engag1ng; in. the groove,

such; thatthe. hand. may be. carrier-1; around by the shaft but without interference from the. fork. Anarmll as an extensiom from the fork-is suitably held at its remote end, as for: instance-lby a fastening totlma covers "While this fasteningmay be (in some; instances; at the sideportion ofthe cover, gen-.1

gerally it is preferableto placedt, asat 12in,

connection with aplateil llformingapart of the. cover assembly. A resilientg; guard 131 also .supported from. the cover extends over to a position above the grooved .collar 10., Extending through the cover glassloisa;

bushingol6 securedvatitsinner end tothe plate 14 and: locked. externally by z a nut. :17, i and. -reciprocably& and oscil-lably nountecl in a the. bushing.- .is a stem. 18 which; at its .inner. end. is headedat19 to allow slight oscillatory;

movement inithe. arm zllwwithout separation I therefrom. A spring 20"interposed between: the armandthe. covernormally'tendsto-holcb the .arm down-,the precise position being" erned by a thumb'leverQl;secured to theouter 1 .endiof the stem 18 andica 'ia ble of.-Inovement.,..10o,

through a short arcuate sweep, the member 21 in such arcuate sweep travelling over the outer edge of the bushing 16 which in its con tour includes a cam depression 22. The thumb lever 21 will thus be seen to allow of tight seating of the running hand in operating engagement with the shaft, as shown in Fig. 5 for instance, when the thumb lever is in the lowest or depressed portion 22 of the cam, and when the thumb .lever is turned arcuately so as to ride up on the higher portion of the cam bushing, the stem 18 is correspondingly drawn outwardly and with it the arm 11' to raise the running hand 5 enough to disengage it from driving relation with the shaft. I

' Mounted also in the cover assembly is a maximum indicating hand 23. Conveniently this may be mounted in plate 14 for the necessary oscillatory movement, a stud 24 headed at'25 suitably providing for such relation, and secured to the hand 23 is a disk 26 frictionally engaged or finely toothed and engaged by a dog 27, the purpose of such arrangement being to maintain the maximum indicating hand in its advanced position at any time, a spring 3 tends normally to return the maximum hand to zero. The maximum hand is driven from the running hand, and.

for this any suitable interengaging means may be provided; as a projection on one of the ends, for instance a projection 28 on the maximum hand in the normal path of the running hand whereby the maximum hand may be pushed along.

For releasing the maximum hand as held by the dog in its advanced position, a release means is provided, also carried by the cover assembly, and this may include a dog releasing member actuable through the side of the cover or preferably through the top, and advantageously embodying for instance a wedge member 29 projectable against the dog 27 whereby to crowd it back from contact with the ratchet 26. ,The actuation of the wedge member 29 may desirably be had by means of a push button 30 on a stem 31 carrying the wedge member 29, the stem being mounted for slight reciprocable movement in a bushing 32 secured to the plate 14 at its inner end and held by a nut 33 against the cover glass externally. A spring 34 serves normally to hold the member 29 out of the path of the dog.

In use, the general mode of operation will be clear from the foregoing. With rotary movement transmitted through connection 35 from the customary flexible lead to the vehicle, and translated by the. speedometer mechanism into an oscillatory movement proportionate to the speed, as involved in the movement of shaft 2, the running hand 5 is normally in engagement therewith so as to sweep over the dial and on decline of speed return. When it is desired to retain a registry of the running speed at any given instant, the running hand is disengaged from the shaft at that point so as to remain in its position while the shaft moves irrespective, this being accomplished by throwing the thumb lever 21 arcuately to ride up on the cam raiser, thereby lifting the arm 11' and the hand 5 suflicicntly to disengage the connection with the drive. When such registryof that particular point is no longer desired, by reverse throw of the thumb lever 21 into the cam depression, the arm 11' is correspondingly lowered to allow the projection 8 to again seat in the recess 9, and the hand ,to be carried by the movement of the shaft. By reason of the finger 28 of the maximum hand extending into the path of the running hand 5, the maximum hand, as seen, is pushed along in the excursion of movement of the running hand, and the dog 27 retains the maximum hand. The coil spring 8 tending normally to return the maximum hand to zero is ordinarily overcome by the action of the dog 27. But when it is desired to return such hand, a pressure on the button 30 wedges the dog 27 out of en gagement, and the spring 8 thereupon swings the hand back to starting point.

It will thus be seen that a construction is had making possible the obtaining'of any desired registry of speed at any particular time, and a separate showing of maximum speed obtained, each being controllable as desired, and the assembly is so mounted as to constitute a self contained unit readily separable from the driving mechanism, thus greatly facilitating repair of the latter. F urthermore, by reason of the positioning of all control means forwardly, the control and operation of the device is greatly facilitated, particularly for the case of traflic oflicers using 'motor bicycles and correspondingly requir adapted to operate said member, and connecting means optionally engageable and disengageable therebetween.

2. In a speed indicating device, the combination of an indexing member, a shaft adapted to operate said member, and a projection on one and a recess in the other optionally engageable and disengageable.

3. In a speed indicating device the combination of a cover, and a maximum indicating hand carried by said cover.

4. In a speed indicating device, the combination of a cover, and a running hand carried by said cover.

5. In a speed indicating device, the combination of a cover, and a running hand and a maximum indicating hand carried thereby.

6. In a speed indicating device, the combination of a. cover, a maximum indicating hand carried by said cover, means for retaining the hand in its advanced position, and means in the cover for releasing the hand.

7. In a speed indicating device, the combination of a. cover, a maximumindicat'ing hand carried by said cover, a dog for holding the maximum hand in its advanced position, and a Wedge member in the cover for displacing the dog.

8. In a speed indicating device, the combination of a cover, a bushing in said cover, a stem reciprocable in said bushing having a dog-engaging Wedge at its inner end, and means normally holding the Wedge out of engagement.

9. In a speed indicating device, the combination of a shaft having a free end, a running hand connectible thereto, a plate spaced over said shaft end, another hand mounted in said plate, and interengaging means whereby the running hand may push the other hand.

10. In a speed indicating device, the combination of an indexing member, a shaft adapted to operate said member, a pin on the indexing member, a receiving recess carried by the shaft, and means to optionally separate and engage the pin and recess.

11. In a speed indicating device, the combination of a shaft having a free end, a running hand connectible thereto, a plate spaced over said shaft end, another hand mounted in said plate, ratchet means to maintain said other hand in its advanced position, means extending through said plate to release said hand, and interengaging means whereby the running hand may push the said other hand.

12. In a speed indicating device, the combination of a shaft, a running hand, a projection on said hand, a hub fixed to said shaft and having a recess to receive such projection, and a manually operating member for cisengaging said hand.

13. In a speed indicating device, the combination of a shaft having a free end, a hub fastened thereto and having a recess at one point, a running hand having a cooperating projection, another hand mounted coaxial with said running hand and arranged to be pushed thereby, and manually operating means for engaging and disengaging the running hand with said shaft.

14:. In a speed indicating device, the combination of a shaft having a free end, a hub disk fixed thereto and having an opening at one point, a running hand having a coacting pin, a plate spaced over said shaft end, a run- ,ning hand mounted in said plate, interengaging means whereby the said hand may push the running hand, and means extending through said plate for separating said running hand from the shaft.

15. In a speed indicating device, the combination of a shaft having a free end, a hub disk fixed thereto and having an opening at one point, a running hand, a coacting pin on the running hand, a grooved hub collar on said running hand having an opening t0 seat over the end of said shaft, a fork in the groove of said hub collar,and manually operable means for shifting said fork.

16. In a'speed indicating device, the combination of a shaft having a free end, a hub disk fixed thereto and having an opening at one point, a running hand, a coacting pin on the running hand, a grooved hub collar on said running hand having an opening to seat over the end of said shaft, a fork in the groove of said hub collar, an arm carrying said fork, a cover plate, an oscillable stud mounted in said cover plate and headed through said fork-arm, and cam means for reciprocating said stud in its oscillatory movements.

17. In a speed indicating device, the combination of a protective glass, a maximum indicating hand carried thereby, means for retaining the maximum hand in its advanced position, means for releasing said maximum hand retaining means, a running hand, a. grooved collar on said running hand, a fork supported by said glass and engaging in said grooved collar, a stem extending through said glass to control said fork, and means externally of the glass for operating said stem.

18. In a speed indicating device, the combination of a shaft having a free end, a hub disk fixed thereto and having an opening at one point, a running hand, a coacting pin on the running hand, a grooved hub collar on said running hand having an opening to seat over the end of said shaft, a fork in the groove of said hub collar, a cover plate,an arm support from said cover plate and carrying said fork, a bushing in said cover plate and having a cam depression in its outer hand, an oscillable stem journaled in said bushing and headed through said fork-arm, a spring between said arm and sa d cover plate, and a thumb lever extending radially from the outer hand of said stem and riding in and out of such cam depression.

Signed by me this 18th day of December,

EUGENE F. MARTINET.

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